JPH10252328A - Keyless entry device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily set different codes according to operation within a range of operation by a method wherein a condition to perform setting of a code according to operation is easily realized at a manufacturing stage and determined such that realization is difficult to make the using state of a user. SOLUTION: A state change-over switch 22 has a common contact connected to the output of a code receiving part 21. A code deciding part 23 decides that a code received by the code receiving part 21 coincides with a code stored at a code memory part 25. In a code stored at a code memory part 25, a code received by the code receiving part 21 is stored as a code for an own system in a registration state that an individual contact (b) of the state change over switch 22 is connected to a common contact. In ordinary operation, a signal is outputted to each part of an automobile from an operation set part 24 such that predetermined operation is performed. Further, the change-over switch 22 is arranged in a casing and the switch is usually brought into a state that operation from the outside is impossible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keyless entry device which performs an operation as to whether a door is locked or unlocked by a code transmitted from a code transmitter.

[0002]

2. Description of the Related Art Conventionally, a keyless entry system called a keyless entry system has been used to determine whether or not an operation such as locking or unlocking a door of an automobile is possible or to improve the convenience of switching the operation and prevent theft. Have been applied. In keyless entry systems for automobiles,
When a specific code is transmitted from a code transmitter possessed by a user, a receiver mounted in the vehicle recognizes the code and locks or unlocks the door. For theft prevention, the code must be different for each vehicle and cannot be easily duplicated.

FIG. 20 shows a schematic electrical configuration of a conventional code transmitter 1. The code transmitter 1 is housed in a small housing so that it can be operated while being held in the palm of the hand. The transmission switch 2 can be operated from outside the housing. In response to the operation of the transmission switch, a radio wave including a specific code is transmitted from the antenna. A specific code is set in the code setting / storage unit 4 in advance using a read-only memory (hereinafter abbreviated as “ROM”), a switch, or the like.
When the transmission switch 2 is turned on, the code is transmitted via the transmission unit 5 and the antenna 3. From the viewpoint of theft prevention, it is preferable that the setting contents of the code remain unknown to the user. For this reason, this setting is performed at the production stage of the code transmitter 1.

[0004] A prior art for updating the code in a keyless entry system or the like to improve the security against code copying is disclosed in, for example, JP-A-7-95667. In this prior art, a code is divided into a first code and a second code, and the first code is replaced with a second code every transmission,
The second code is replaced with a new random number code. The receiving side determines whether or not the first code matches the stored code, and if so, newly stores the second code to prepare for the next determination.

[0005]

In the code transmitter 1 as shown in FIG. 20, since a ROM, a switch, and the like are used for the code setting / storage section 4, the number of parts increases, and the size and the cost are reduced. It hinders. Furthermore, if the code is set by using a ROM or a switch, it is necessary to set a different code individually.
Code management man-hours increase. For example, if a code is set in a ROM, a switch is not necessary, but it cannot be manufactured in a batch at the stage of manufacturing a semiconductor integrated circuit. Since you need to write different codes individually,
The cost advantage of the semiconductor integrated circuit obtained by mass-producing products of the same specification cannot be obtained.
The increase in the number of steps and the number of parts increases the manufacturing cost and the cost of the code transmitter 1 itself.

When the code is changed every time as in the prior art of Japanese Patent Application Laid-Open No. 7-95667, the configuration for performing necessary control becomes complicated, and the cost is unavoidable. In addition, since the receiver needs to change the determination reference code using a part of the transmission code every transmission, the transmission code must be reliably received every time. If a code is transmitted from the transmitter due to an erroneous operation outside the reception range or the like, the receiver will not be able to accept the code in the next transmission.

[0007] An object of the present invention is to eliminate the need for ROM writing, switches, and other components at the manufacturing stage for code setting and storage, reduce code setting and management man-hours, and reduce the size and the size of the transmitter. An object of the present invention is to provide a keyless entry device that can be priced.

[0008]

According to the present invention, a receiver receives a code transmitted remotely from a transmitter and confirms that the code matches a code registered in advance. In a keyless entry device that performs an operation regarding permission / prohibition, a transmitter sets a code based on an operation when a switch for instructing code transmission and an operation that satisfies a predetermined condition are performed on the switch. Setting means, and a transmitting means for transmitting a code set by the setting means when an operation performed on the switch does not satisfy a predetermined condition, wherein the receiver determines an operation state by the received code. Switching means for switching between a registration state for registering a password and a normal state for performing a keyless entry operation based on a received code; and Storage means for storing a code; determining means for determining whether a received code matches a code stored in the storage means when the operation state is the normal state; and determining whether the operation state is the normal state. Setting means for setting an operation as to whether or not entry / exit is possible when the determination means determines that the received code matches the stored code. It is. According to the present invention, for a switch for instructing code transmission included in the transmitter,
When an operation that satisfies a predetermined condition is performed, a code corresponding to the operation is set by the setting unit. If the conditions for setting the code are determined so that they can be easily realized at the manufacturing stage and difficult to realize in the usage condition of the user, it is easy to set different codes corresponding to the operation within the conditions. Can be. By switching the switching unit to the registered state, the receiver can transmit the set code from the transmitter, and can easily store the code in the storage unit. If the switching means is switched to the use state, only the transmitter that transmits the code that matches the code stored in the storage means can perform the operation as to whether or not it is possible to go in and out.

In the present invention, the condition for setting the code by the setting means of the transmitter is a switch operation performed during an initialization operation after the start of power supply. According to the present invention, the code can be set during the initialization operation after the start of power supply, so that the code can be easily set by operating the switch after connecting the battery to the transmitter.
If the power consumption of the transmitter is reduced, the battery can be used for a long period of time. Since power is continuously supplied, the code can be stored in a readable / writable memory (hereinafter, abbreviated as “RAM”), and storage and reading can be easily performed. If the code is stored in RAM, the code will be erased when the battery is replaced, etc., but the code must be reset during the initialization operation,
If the receiver also switches to the registration state, a new code can be registered and used.

Further, in the present invention, the setting means of the transmitter sets a code in accordance with a time during which the switch is turned on by a predetermined number of operations. According to the present invention, a code can be set according to the switch conduction time when the switch is operated one or more times during the initialization operation after the start of power supply. As long as a person operates the switch, the conduction time is different every time, and a different code can be easily set for each transmitter without paying attention to the management of the code.

Further, in the present invention, the setting means of the transmitter sets a code in accordance with a chattering state when the switch is turned on by a predetermined number of operations. According to the present invention, a code can be set in accordance with a chattering state when a switch is operated one or more times during an initialization operation after the start of power supply. Since chattering occurs randomly, a different code can be easily set for each transmitter without being conscious of code management.

Further, in the present invention, the setting means of the transmitter sets a code based on a time interval at which the switch is turned on by a plurality of predetermined operations. According to the present invention, a code can be set corresponding to a time interval at which the switch is turned on when the switch is operated a plurality of times during the initialization operation after the start of power supply. As long as a person operates the switch, the time interval is different every time, and a different code can be easily set for each transmitter without being conscious of the management of the code.

[0013] In the present invention, the setting means of the transmitter sets the code based on a time required for the switch to change from the cut-off state to the conductive state by a predetermined number of operations. According to the present invention, the code can be set according to the time required for the switch to change from the cut-off state to the conductive state when the switch is operated a plurality of times during the initialization operation after the start of power supply. As long as a person operates the switch, the time required for the switch to change from the cut-off state to the conductive state is different every time, and a different code can be easily set for each transmitter without being conscious of the management of the code.

Further, in the present invention, the transmitter has a plurality of switches, and the setting means sets a code based on an operation sequence for the switches. According to the present invention, the code can be set based on the operation order of the plurality of switches of the transmitter, so that the code can be easily set and managed. Since a code is set by a switch operation, an arbitrary code can be set in the same manner as when a code setting switch is provided.

In the present invention, the setting means of the transmitter performs the initialization operation when a predetermined operation is performed on a switch. According to the present invention, it is possible to return to the initialization operation and perform the code setting again by performing a predetermined operation on the switch, for example, by continuously pressing the switch for several seconds or simultaneously pressing the switches when there are a plurality of switches. . Even if the set code is inconvenient, it can be easily reset.

In the present invention, the receiver is mounted on a vehicle and performs an operation as to whether or not the vehicle can enter or leave the vehicle, and the switching means responds to a predetermined operation on an operation unit of a device mounted on the vehicle. Then, the operation state of the receiver is switched to the registration state. According to the present invention, the operation of switching the receiver to the registered state can be performed using a device mounted in the vehicle, for example, a switch of a car audio device. Thus, when the transmitter is lost or the code is reset, the operability when registering the code on the receiver side can be improved.

[0017]

FIG. 1 shows a schematic electrical configuration of a keyless entry device as a first embodiment of the present invention. This keyless entry device is used for a keyless entry system of an automobile, and includes a code transmitter 10 carried by a user and a receiver 20 mounted inside the automobile. The code transmitter 10 is provided with a transmission switch 11. When the user presses the transmission switch 11, the transmission switch 11 is turned on, and when the user stops pressing the transmission switch 11, the transmission switch 11 is turned off. When the transmission switch 11 is in the conductive state, a radio wave including a preset code is transmitted from the code transmitter 10.

FIG. 2 shows the internal configuration of the code transmitter 10 of FIG. Power required for the operation of the code transmitter 10 is supplied from the battery 12. Radio waves including the code are transmitted from the small antenna 13. Except during code transmission, the power consumption of the code transmitter 10 is set to be extremely low, so that even a button-type and small battery 12 does not require battery replacement for several years. As will be described later, the code can be set in the code setting / storage unit 14 formed by the low power consumption semiconductor integrated circuit after the power supply by the battery 12 is started. The set code is transmitted from the code transmission unit 15 via the antenna 13 when the transmission switch 11 is conductive. Code setting and storage unit 14
The RAM 16 is a setting means for setting a code.
And a central processing unit (hereinafter abbreviated as “CPU”) 17. When power is turned on, for example, battery 1
2, a reset circuit 18 for resetting the CPU 17 and causing a preset initialization operation;
The ROM 19 and the like in which the operation program of the PU 17 is stored are also included in the code setting / storage unit 14.

As shown in FIG. 1, a receiver 20 includes a code receiving section 21, a state changeover switch 22, and a code determining section 2.
3, including an operation setting unit 24 and a code registration unit 26. The code receiving unit 21 receives a radio wave including a code transmitted from the code transmitter 10. The state switch 22 serving as a switching unit has a common contact connected to an output of the code receiving unit 21. One individual contact a of the state switch 22
Is connected to the input of the code determination unit 23, and the output of the code determination unit 23 is connected to the input of the operation setting unit 24. The operation state in which the common contact is connected to the individual contact a is the normal state. The code determining unit 23 determines whether the code received by the code receiving unit 21 matches the code stored in the code storage unit 25. The code stored in the code storage unit 25 corresponds to the individual contact b of the state switch 22.
In the registered state where is connected to the common contact, the code received by the code receiving unit 21 is stored as the code of the own system. In the normal operation, a signal is output from the operation setting unit 24 to each unit of the automobile so as to perform a predetermined operation. The state change switch 22 is installed inside the housing or the like, and is normally set in a state where external operation is impossible.

As shown in FIG. 2, the code setting / storage section 14 of the code transmitter 10 includes a transmission switch 11 and a CPU.
17, an input / output circuit (hereinafter abbreviated as “I / O”) 27, an oscillating circuit 28 for generating a clock signal serving as a time reference, and a counter 29 for counting clock signals and measuring time. Is also included.

FIG. 3 shows the operation of the code transmitter 10 of the present embodiment. When the battery 12 is connected in step a1, the power changes from OFF to ON as shown in FIG. 4, and the power is turned on. In step a2, the process waits until the transmission switch 11 is turned on and becomes conductive. When the transmission switch 11 is turned on, it counts the time t ₂ the counter 29 at step a3. In step a4, it is determined whether or not the transmission switch 11 is off in the cutoff state. If it has not been turned off, the process returns to step a3 to continue time measurement. In step a4, the transmission switch 1
If it is determined that 1 is off, step a5
Then, a code is generated using the measured time t ₂ ,
It is stored in the RAM 16. Code generation, for example, as previously set by the initial value of the calculation of the random number generating, using the measured value of the time t _2, and encodes the calculation result. It is also possible to directly encoding time t _2. The same applies to the other embodiments described below.

In steps a1 to a5, the code setting operation at the start of power supply is completed, and thereafter the original operation using the set code is performed, and steps a6 and a7 are repeated. At step a6, it is determined whether or not the transmission switch 11 is on, and if it is on, code transmission is performed at step a7.

FIG. 5 shows an operation according to the second embodiment of the present invention. In the present embodiment, it is assumed that the same code transmitter 10 and receiver 20 as those in the first embodiment are used. The same applies to other embodiments described below unless otherwise specified. In the present embodiment, code setting is performed by using a state that occurs when a switch is pressed and is called chattering, and the connection state becomes unstable. When the battery 12 is connected in step b1, the power is turned on from OFF.
The power is turned on. At step b2, chattering removal processing is performed. In step b3, it is determined whether or not the transmission switch 11 is on even if the chattering is removed. If the transmission switch 11 is not turned on, the process returns to before chattering removal.

As shown in FIG. 6, the chattering elimination process is set as a subroutine starting from step b10. In step b11, the switch stabilization time t _n
And time t _k from the switch state change start is initialized to 0. In step b12, the current switch state S
The switch state detection value SW _new is substituted for W _now . At step b13, it counts the time t _n, t _k. In step b14, the time t _n is compared with t _α as a switch stabilization time determination value. If t _n > t _{α is} not satisfied, the state of the transmission switch 11 is changed to SW _now = SW _{new in} step b15.
It is determined whether or not they match. If the states match, the process returns to step b13. If the states do not match, the time t _n is re-initialized to 0 in step b16,
Return to 12. If t _n > t _α in step b14,
It is determined that chattering has ended, the chattering continuation time t ₃ = t _k −t _α and SW _now are output in step b17, and the program returns to the original program in step b20. FIG.
Indicates the relationship among the respective times t _k , t ₃ , and t _α .

Returning to FIG. 5, if it is determined in step b3 that the transmission switch 11 is turned on, step b
In step 4, a code is generated using the chattering duration time t3 and stored in the RAM 16. The code setting operation at the start of power supply is completed in steps b1 to b4. Thereafter, the original operation using the set code is performed. Steps b5 and b6 basically correspond to steps a6 and b6 in FIG. a7. Since the chattering phenomenon occurs randomly, it is expected that the chattering continuation time t3 is also measured at random. It should be noted that chattering is unavoidable for a transmission switch that is mechanically operated, and the state of the switch is generally determined after a lapse of time that is considered to have no influence of chattering. In the present specification, it is assumed that the on / off state of the switch is determined in a state where chattering is removed, except when chattering is used.

FIG. 8 shows an operation according to a third embodiment of the present invention. In this embodiment, after power is supplied,
When the transmission switch 11 is operated to be turned on n times, a code is generated by using the time during which the transmission switch 11 is turned on, for example, the total time during which the switch is turned on. When the battery 12 is connected in step c1, the power supply becomes O
The state changes from FF to ON, and the power is turned on. In step c2, the parameter x is initialized to 0. In step c3, the process waits until the transmission switch 11 is turned on. When the transmission switch 11 is turned on, it counts the time t _4x turned on in the step c4. Unless it is determined in step c5 that the transmission switch 11 is turned off, the time count of step c4 is repeated. When the transmission switch 11 is turned off in step c5, the value of the parameter x is increased by 1 in step c6, and it is determined in step c7 whether the specified number of times has reached n. If the specified number n has not been reached, the process returns to step c3.

If it is determined in step c7 that x = n, then in step c8, an operation of summing the values of each t _x , t ₄
= T ₄₁ + t ₄₂ +... + T _4n , and the total on-time value t ₄
Generate code using. Step c8 and step c9 are basically equivalent to step a6 and step a7 in FIG. FIG. 9 shows an example where n = 3.

FIG. 10 shows the operation of the fourth embodiment of the present invention. In the present embodiment, when the transmission switch 11 is operated to be turned on n times after the power is supplied, a code of the chattering state, for example, the total time required until the switch state is stabilized is used. Generate When the battery 12 is connected in step d1, the power supply becomes O
The state changes from FF to ON, and the power is turned on. At Step d2, the parameter x is initialized to 0. In step d3, chattering is removed as in step b2 of FIG. At this time, the switch stabilization time t _nx and the time t _kx from the start of the switch state change are counted by the same processing as in FIG. 6, and t _5x = t _kx −t _α is calculated.
In step d4, the process waits until the transmission switch 11 is turned on. When the transmission switch 11 is turned on, step d5
In step d6, the value of the parameter x is increased by 1.
It is determined whether or not the specified number of times has been reached. If the number n has not been reached, the process returns to step d3.

[0029] When it is determined that x = n in step d6, at step d7, as shown for the case in FIG. 11 of the n = 3, arithmetic summing the values for each _{tx, t 5 = t 51 +} t
It performed ₅₂ + t _53, by using the total value t ₅ of chattering duration to generate code. Step d8 and step d9 are basically equivalent to step a6 and step a7 in FIG.

FIG. 12 shows an operation according to a fifth embodiment of the present invention. In the present embodiment, when the transmission switch 11 is operated to be turned on n times after the power is supplied, a code is generated using the total of the switch-on and switch-off time intervals. Battery 1 in step e1
When 2 is connected, the power changes from OFF to ON, and the power is turned on. In step e2, the parameter x is initialized to 1. In the first switch-on, since there is no preceding switch-on, the time interval is measured from the next switch-on. In step e3, the transmission switch 11
Wait for to turn on. When the transmission switch 11 is turned on, the process waits at step e4 until the transmission switch 11 is turned off. When the transmission switch is turned off, the time t _6x is counted in step e5, and thereafter, the operation is repeated until the transmission switch 11 is turned on in step e6. Transmission switch 11
Is turned on, the value of the parameter x is increased by 1 in step e7, and it is determined in step e8 whether or not the specified number n has been reached. If the specified number n has not been reached, the process returns to step e4.

If it is determined in step e8 that x = n, then in step e9, as shown in the case of n = 3 in FIG. 13, the operation of summing the values of each t _6x , t ₆ = t ₆₁ + t
Perform ₆₂ to generate a code using the total value t ₆ of the switch-on and switch-off time intervals. Step e10
Step e11 is basically the same as step a6 and step a7 in FIG.

FIG. 14 shows the operation of the sixth embodiment of the present invention. In the present embodiment, the code is generated using the time from when power is supplied to when the transmission switch 11 is turned on for the first time or when the transmission switch 11 is turned on for the nth time. When the battery 12 is connected in step f1, the power changes from OFF to ON, and the power is turned on. In step f2, the parameter x is initialized to 0. Step f
The time t ₇ is counted at 3 and thereafter repeated until the transmission switch 11 is turned on at step f4. When the transmission switch 11 is turned on, the parameter x is determined in step f5.
Is increased by 1 and it is determined in step f6 whether or not the specified number of times has been reached. If the specified number n has not been reached, the process returns to step f3.

[0033] When it is determined that x = n in step f6, in step f7, generating a code by using the time t ₇ as shown for the case of n = 3 in FIG. 15. Steps f8 and f9 are basically equivalent to steps a6 and a7 in FIG.

FIG. 16 shows a schematic electrical configuration of a code transmitter 30 according to a seventh embodiment of the present invention. In this configuration, portions corresponding to the code transmitter 10 shown in FIG. 2 are denoted by the same reference numerals, and redundant description will be omitted. In the present embodiment, the code transmitter 40 is provided with two or more transmission switches 31a and 31b. In the code setting / storage section 44, after power is supplied, the switches 31a, 3a
A program is created and stored in the ROM 39 so that a code is generated using the order in which 1b is pressed n times as prescribed and stored in the RAM 16. After the code is generated, when the transmission switches 31a and 31b are turned on, the RA
The code stored in M16 is transmitted from code transmission unit 15 via antenna 13.

For example, two transmission switches 31a, 3
When the ON operation for 1b is indicated by A and B respectively, the specified number of times is set to 16, and these switches are set to [AABBA
[BBABAABBBAA]]. When A and B correspond to “0” and “1”, respectively, it becomes [0011011010011100], and a code is generated using this.

FIG. 17 shows an operation according to the eighth embodiment of the present invention. In this embodiment, the first embodiment and the fifth embodiment
Code generation is performed by combining the idea with the form. The code transmitter shown in FIG. 2 is used for convenience of explanation. When the battery 12 is connected in step g1, the power changes from OFF to ON, and the power is turned on. In step g2, the process waits until the transmission switch 11 is turned on. Transmission switch 11
Is turned on, the time t _9on is counted in step g3, and the counting is continued until the transmission switch 11 is turned off in step g4. When the transmission switch 11 is turned off in step g4, the time t _9off is counted in step g5, and the counting is continued until the transmission switch 11 is turned on in step g6. When the transmission switch 11 is turned on in step g6, in step g7, the total time t ₉ = t _9on
Generate code using + _t9off . Step g8 and step g9 are basically equivalent to step a6 and step a7 in FIG.

FIG. 18 shows the operation of the ninth embodiment of the present invention. In this embodiment, a code different from the code once generated can be regenerated. The transition to the code regenerating state can be performed by simultaneously pressing the switches 31a and 31b in the case of the code transmitter 30 as shown in FIG. In the present embodiment, the code transmitter shown in FIG. 2 is used for convenience of explanation. When the battery 12 is connected in step h1, the power changes from OFF to ON, and the power is turned on. Step h2
Then, it waits until the transmission switch 11 is turned on. When the transmission switch 11 is turned on, the time t is counted in step h3, and the counting is continued until the transmission switch 11 is turned off in step h4. Transmission switch 1 in step h4
When 1 is turned off, a code is generated using time in step h5. The concept of this code generation is the same as in the first embodiment shown in FIG. A code can be generated in the same manner as in the second to seventh embodiments.

In step h6, the process waits until the transmission switch 11 is turned on. From step h7 to step h8,
Transmission switch 11 to count the time t ₁₀ that are turned on. When the transmission switch 11 is turned off, step h
9, a comparison between the time t ₁₀ and the reference time t _r. If the comparison result is t ₁₀ <t _r, performs normal code transmitted at step h10, the flow returns to step h6. The comparison result is t ₁₀ <
as long as t _r, the process from step h6 to step h10 is basically equivalent to the step a6 and step a7 in FIG. If the comparison result is not t ₁₀ <t _r , the process returns to step h1, and the code can be set again. According to the present embodiment, the code can be easily changed, for example, when a system that uses the same code happens to occur.

FIG. 19 shows, as a tenth embodiment of the present invention, a configuration on the receiver side that can improve the operability of code registration. In the receiver 40, the receiver 20 shown in FIG.
The same reference numerals are given to the portions corresponding to and the duplicate description will be omitted. Usually, devices such as a car audio device 41 and a navigation device are mounted in the cabin of an automobile equipped with a keyless entry system. In the present embodiment, the state switch 42 that switches the operation state of the receiver 40 from the normal state to the registered state is controlled by a specific operation on the car audio device 42. The space that can be used as an operation surface in the vehicle interior is limited, and is usually occupied by the car audio device 41 or the like, and it is difficult to use the keyless entry system. According to the present embodiment, the receiver can be used when the code transmitters 10 and 30 are lost or the battery is replaced without sacrificing the space in the vehicle for operating the state changeover switch 42, which is used less frequently. It is possible to improve operability when code registration is required on the side.

[0040]

As described above, according to the present invention, if conditions are determined so that they can be easily realized, for example, in the manufacturing stage, but difficult to be realized in the state of use by the user, the operation can be performed within the range of the conditions. Different codes can be easily set. By switching the operation state to the registration state, the receiver can store the set code, and only the transmitter that transmits a code that matches the stored code generates an operation as to whether or not it can enter or leave. Will be able to do that. In order to set and store codes at the manufacturing stage, there is no need to write to ROM or set switches, reducing parts and man-hours,
The size and the price can be reduced. Further, according to the present invention, a code can be easily set by, for example, a switch operation after connecting a battery to the transmitter. If the power consumption of the transmitter is reduced, the power is continuously supplied for a long period of time, so that the code can be stored in the RAM, which is easier to store and read than when writing to the ROM. Can be done. If the code is stored in RAM, the code will be erased when the battery is replaced, etc., but if the code is reset during the initialization operation and the receiver switches to the registration state, a new code will be registered Can be used.

Further, according to the present invention, a code can be set according to the conduction time by a switch operation during an initialization operation after the start of power supply. If you do random operations,
Different codes can be easily set for each transmitter.

Further, according to the present invention, a code can be set according to a chattering occurrence state by operating a switch during an initialization operation after the start of power supply. Since chattering occurs randomly, a different code can be easily set for each transmitter.

Further, according to the present invention, a code can be set corresponding to the time interval of the conductive state by a plurality of switch operations during the initialization operation after the start of power supply. If a random operation is performed, a different code can be easily set for each transmitter.

Further, according to the present invention, a code can be set corresponding to the time required from the cutoff state to the conduction state by operating the switch during the initialization operation after the start of power supply. If a random operation is performed, a different code can be easily set for each transmitter.

Further, according to the present invention, the codes are set based on the operation order of a plurality of switches. Therefore, even if a code setting switch is not provided, a random code or an intended code can be used as in the case where a code setting switch is provided. , Any code can be set.

According to the present invention, the code can be set again by performing a predetermined operation on the switch. Even if the set code is inconvenient, it can be easily reset. For example, by chance,
If there is another keyless entry device with the same code nearby, malfunction will occur if used as it is, but if the code is reset, it can be easily dealt with without replacing the transmitter .

According to the present invention, the code registration to the receiver can be performed by using a switch of a device mounted in the vehicle. When code resetting is necessary due to loss of a transmitter or the like, operability when registering a code on the receiver side can be improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic electrical configuration of a first embodiment of the present invention.

FIG. 2 is a block diagram showing a schematic electrical configuration of the code transmitter 10 of FIG.

FIG. 3 is a flowchart showing an operation of the code transmitter 10 of FIG.

FIG. 4 is a time chart showing the operation of the code transmitter 10 of FIG.

FIG. 5 is a flowchart illustrating an operation according to the second exemplary embodiment of the present invention.

FIG. 6 is a flowchart showing chattering removal processing in step b2 of FIG. 5;

FIG. 7 is a time chart corresponding to the operations of FIGS. 5 and 6;

FIG. 8 is a flowchart showing the operation of the third embodiment of the present invention.

9 is a time chart corresponding to the operation in FIG.

FIG. 10 is a flowchart showing the operation of the fourth embodiment of the present invention.

FIG. 11 is a time chart corresponding to the operation in FIG. 10;

FIG. 12 is a flowchart showing the operation of the fifth embodiment of the present invention.

FIG. 13 is a time chart corresponding to the operation in FIG. 12;

FIG. 14 is a flowchart showing the operation of the sixth embodiment of the present invention.

FIG. 15 is a time chart corresponding to the operation in FIG. 14;

FIG. 16 shows a code transmitter 30 according to a seventh embodiment of the present invention.
FIG. 3 is a block diagram showing a schematic electrical configuration of FIG.

FIG. 17 is a flowchart showing the operation of the eighth embodiment of the present invention.

FIG. 18 is a flowchart showing the operation of the ninth embodiment of the present invention.

FIG. 19 is a block diagram showing a schematic electrical configuration of a receiver 40 according to a tenth embodiment of the present invention.

FIG. 20 is a block diagram showing a schematic electrical configuration of a conventional code transmitter 1.

[Explanation of symbols]

 10, 30 Code transmitter 11, 31a, 31b Transmission switch 12 Battery 14, 34 Code setting / storage unit 15 Code transmission unit 16 RAM 17 CPU 18 Reset circuit 19, 39 ROM 20, 40 Receiver 21 Code reception unit 22, 42 Status changeover switch 23 code determination unit 24 operation setting unit 25 code storage unit 26 code registration unit 29 counter 41 car audio device

Claims (9)

[Claims] 1. A keyless entry for receiving / receiving a code transmitted remotely from a transmitter, and confirming that the code matches a pre-registered code, thereby performing an operation as to whether or not to enter / exit. In the device, the transmitter includes: a switch for instructing code transmission; setting means for setting a code based on the operation when an operation that satisfies a predetermined condition is performed on the switch; Transmitting means for transmitting a code set by the setting means when the operation to be performed does not satisfy a predetermined condition, wherein the receiver has an operation state, a registration state for registering the received code,
Switching means for switching to a normal state for performing a keyless entry operation based on a received code; storage means for storing a code when the operation state is a registration state; and reception when the operation state is a normal state. Determining means for determining whether the code matches the code stored in the storage means, and determining that the received code matches the stored code when the operating state is the normal state Setting means for setting an operation as to whether or not entry / exit is possible when the determination is made by the means. 2. The keyless entry device according to claim 1, wherein the condition for setting the code by the setting means of the transmitter is a switch operation performed during an initialization operation after the start of power supply. 3. The keyless entry device according to claim 2, wherein the setting unit of the transmitter sets a code in accordance with a time during which the switch is turned on by a predetermined number of operations. 4. The keyless apparatus according to claim 2, wherein the setting means of the transmitter sets a code in accordance with a chattering state when the switch is turned on by a predetermined number of operations. Tentry equipment. 5. The transmitter according to claim 2, wherein the setting unit of the transmitter sets the code based on a time interval at which the switch is turned on by a predetermined number of operations. A keyless entry device according to any of the claims. 6. The transmitter according to claim 2, wherein the setting means of the transmitter sets the code based on a time required for the switch to change from the cut-off state to the conductive state by a predetermined number of operations. 6. The keyless entry device according to any one of 5. 7. The transmitter according to claim 2, wherein the transmitter has a plurality of switches, and the setting unit sets the code based on an operation order of the switches. Keyless entry device. 8. The keyless entry device according to claim 2, wherein the setting unit of the transmitter performs the initialization operation when a predetermined operation is performed on a switch. . 9. The receiver is mounted on a vehicle and performs an operation as to whether or not the vehicle can enter or leave the vehicle. The switching means responds to a predetermined operation on an operation unit of a device mounted in the vehicle. 9. The keyless entry device according to claim 1, wherein the operation state of the receiver is switched to the registration state.